ESDI terminator values

Chuck Guzis cclist at
Mon Jun 1 23:13:03 CDT 2020

ESDI used by CDC uses 150 ohms to +Vcc as termination on the control
cable.  Signal cables are radial, so they always have termination.

PDF Page 37

Also, generally, the CDC ESDI spec is here:


On 6/1/20 8:09 PM, Chris Zach via cctalk wrote:
> Working on restoring this 11/83, I would like to replace the Fujitsu
> 2284E drive with a slightly larger capacity CDC/Imprimis WREN VI
> 94246-383 ESDI. I think I have the jumper configurations, however the
> problem is the disk does not have a terminator pack.
> Does anyone know what kind of resistor pack was used for the CDC drives?
> It's probably something very basic and easy to find at Digikey but what?
> Thanks!
> Chris
> (working away here)

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